Pulverizing-mill.



No.'65|,798. Patented luna |2, |900.

J. H ELSPASS.

PULYERIZING MILL. (Application led Dec. 18, 1899.)

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No. 651,798. hunted-lune l2, |900.

J. H. ELsPAss.

PULVERIZING MILL.

(App1i-cation led Dec. 18, 1899.) (No Model.) 3 Sheets-Sheet 3.

/gw gy/Wb@ NTTED STATES PATENT OFFICE.

JOHN H. ELSPASS, OF PUEBLO, COLORADO, ASSIGNOR OF ONE-HALF `TO ROBERT HUGHES, OF DENVER, COLORADO. l

PULVERIpZlNG-MILL.

SPECIFICATION forming part 0f Letters Patent No. 651,798, dated June 12, 1900.

Application filed December 18, 1899. Serial No. 740,800. (No model.)

V To @ZZ whom t may con/cern,.-

Beit known that I, JOHN H. ELsrAss, a citizen of the United States of America, residing at Pueblo, in the county of Pueblo and State of Colorado, have invented certain new and useful Improvements in Pulverizng-Mills; and I do declare the following to be a'full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in pulverizing-mills more especially adapted for use in the reduction of mineral-bearing rock to the degree of comminution or fineness required to permit the separation of the mineral values from the gangue, my object being to provide an apparatus of this class which shall be comparatively simple in construction, economical in cost, and reliable, durable, and efficient in use 5 and to these ends the invention consists of the features, arrangements, and combinations hereinafter described and claimed, all of which will be fully understood by reference to the accompanying drawings, in which is illustrated an embodiment thereof.

In the drawings, Figure 1 is a side elevation of my improved mill. Fig. 2 is a top or plan view of the same. Fig. 3 is a section taken on the broken line XX, Fig. 2. Fig. 4 is a sectional View illustrating a detail of construction. Fig.I 5 is a plan view of the same.

Similar reference characters indicating corresponding parts in these views, letthe numeral 5 designate a base-plate upon which are mounted two sets of upright posts 6 and 7, respectively. The posts 6 are located at the outer edge of the baseplate, while the posts 7 are located near the center of the plate. The two sets or series of posts 6 and 7 are equalin number and arranged in pairs, one post 6 and one post 7 forming a pair in which are slidingly mounted boxes 8 and 9, in which are journaled the extremities of a horizontal shaft 10, to which is made fast a pulverizing-roll 12, provided with a depending hardened tire or wearing part 2, at.

tached to the inner body portion 12c by locking-keys 13. The journal-boxes 8 and 9 are each engaged by two coil-springs 14, one being located above and the other below the box. The lower spring engages a stationary support 15, fast on the post and preferably formed integral therewith. The upper extremity of the inner spring is engaged by a movable block 16, slidingly mounted on the post and engaged bya tension-screw 17, passing through the cap 18 at the top of the post. The upper extremity of the screw is provided with a hand-wheel 19 for convenience of adj ustment. Hence the shafts'lO and their su pporting-rolls 12 are held in position bya yielding pressure controlled by the tension-screws.

Located between the inner series of posts 6 and the outer series of posts 7 is a revoluble mortar 20, whose bottom is provided with a detachable hardened bed-plate 21, which is engaged by the rolls l2 and forms the pulver; izing-surface. This mortar is supported from below by conical rollers 22, engaging a track of corresponding shape formed on the bottom of the mortar, whereby there is a perfect rolling contact between the rollers and the mortar, thus reducing the friction to a minimum. The rollers 22 are journaled in boxes 23, mounted on the stationary bed-plate. Exterorly mounted on the inner series of posts 7 is a circular guide-track 24, which is engagedA by a ring 25, mounted on the mortar by means of brackets 26, carried by the mortar and to which the ring is adj ustably attached. The ring 25 is provided with a depending flange 25, adapted to engage and interlock with any upwardly-projecting flange 24?, formed on the stationaryguide-track. Bythisconstruction the mortar is properly centered and made to rotate in a uniform orbit or path.

The rotary movement is imparted to the mortar from a gear 27, engaging a large gear 28, fast on the bottom of the mortar. gear' 27 is fast on a shaft 29, to whose outer extremity is attached a pulley 30, which may be connected with a suitable lnotor (not shown) or other source of poiver. The shaft 29 is journaled in suitable bearings mounted on the base-plate.

The outer wall of the mortar is outwardly inclined as it extends upwardly from the bed-plate, as shown at 20, and is provided The IOO

2 f s snves c through the screen 29 is a circular amalga,

mating-trough 31, supported lon the postsf and provided Wthvan inclined bottom 3.0n and a discharge-mouth In the operation of the machine the mate-` rial to'be treated is fed into the mortar by way of a chute 32, the necessary waterbeing supplied by a pipe 3 3, having depending the instrumentality of the shaft 29, the gearvWheel 27, and the Agear 28 on the bottom. of

the mortar. The rotation of the ymortar operates the rolls l2, which act on the rock with' a crushing and grinding force by virtue of the cylindrical shape of the rolls. When 29int-o the trough 31 and thence from-the machine by Way of a discharge-mouth 30C..

Tothe outer posts 6 are attached horizontal frame-bars 37, provided with inward projections 38, whose extremities are slotted, as shown at 38, to receive depending'arms 35,

by means of suitable nuts 36, applied to the threaded portion ot the arm both above and below said projection. Thelower extremity of each arm is provided with a blade 35, located in suitable proximity to the ledge of the mortar. Any necessary or desired number ot these blades 35a may be employed. They prevent the material from packingon the ledge of the mortar and clogging the screen. These blades occupy an inclined position, as shown in the drawi'ngs,-and have a tendency to throw the material from the ledge into the mortal', where it is acted on by the rolls until it is'properly pulverized to pass through the screen. .The mortar is su pposedto travel in thevdirection indicated by the arrows in Fig. V2. By melans of the nuts 36 and the slots 38' inthe supporting projections 38 the blades 3Ea may be regulated or adjusted as desired, both as to height and inclination.

The bracket 26 is composed of two parts 2G:L and 25.

The part 26,EL israttached to the mortar by means of bolts A, which pass through vertical slots iform'ed in the bracket part.

'Ihe part 26c is provided with a recess adapted. to receive a tongue 26d of the bracket part 26, the two parts beingconnected by a bolt. B, passing throlrgh slots formed in one part and entering a threaded opening formed in the other part. The part 26P is bolted to .the ring 25.

Having thus described my invention, what Iclaim isl 1. In a pulveriZing-mill the combination of an outer and an inner series of posts, shafts jou rnaled in these posts, pulverizingrolls fast on the shafts, an annular revoluble mortar located between the two series of posts, acircularguide-track mountedl on the inner series of posts, a ring mounted on the kmortar and engaging said guide-track, conical rollers located underneath the mortar and engaging a track of corresponding shape formed on the bottom of the mortar, a gear attached to the bottom of the mortar outside of the rollertrack, and an operating-gear meshing with `the gear on the mortar. branches 3l. The mortar is rot-ated through 2. In a pulverizing-mill the combination ,fwith a suitable*supporting-frame, of an annular revoluble mortar, a circular guide-'track mounted on the frame and surrounded by theV {inner wall of the mortar, a ring mounted on ithe mortar and engaging said track, and pul- Lverizingfrolls `coperating with Ithe mortar.

the material has been pulverized to the desired neness, it passes through the screen' 3. The combination with a suitable supl;portingf-irame, of an annular revoluble mortar, conical rollers supporting said mortar Ift'rom beneath, a'guide-trackl attached to the frame and surrounded by the mortar, a ring vmounted on the mortar and engaging said track, and pulverizing-rolls coperatingwith -the mortar.

each of which isv secured to a projection 38 4. The combination with a suitable supporting-frame, of an annular revoluble morvtar, a circular guide-track mount-ed on the iframe and surrounded bythe mortar, a; ring adjustably mounted onthemortar and engaging said guide-track,and pulveri'zing-rolls coperating with the mortar.

5.` The combination of an inner and an outer series of posts, an annular revoluble mortar located between the two series of posts, shafts journaled in spring-supported boxes mountedv onthe posts, pulverizing-rolls fast on the shafts and engaging the mortar a-circular guide-track mounted on the inner series of posts, a ring mounted on the mortar-and engaging said track, the ring and the track beg in g provided with interlocking langes, an annular amalgamating-t-rough surrounding the mortar and adaptedv to receive the discharge `from the mortar, conicalrollers engaging a corresponding track formed o n the bottom of the mo-rtar, a gear fast on the bottom `of the vmortar, and an operating-gear engagingv the mortar-gear.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN II. ELSPASS.

Witnesses:

GRACE MYTINGER, A. J. OBRIEN.

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